Question

27. The presence of coliform in water indicates water is
A) Contaminated with pesticides
B) Contaminated with lead
C) Contaminated with human feces
D) Contaminated by all these​

Answer 1

Answer:

A)Contaminated with pesticides

Answer 2

Answer:

C) Contaminated by human feces

Explanation:

Coliform bacteria are present in the environment and feces of all warm-blooded animals and humans. Coliform bacteria are unlikely to cause illness. However, their presence in drinking water indicates that disease-causing organisms (pathogens) could be in the water system.